Horizontal gel slab electrophoresis unit



FIG. 1 is a perspective view of a horizontal gel slab electrophoresis unit, showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a side elevational view thereof;

FIG. 5 is a right end elevational view thereof. 

The ornamental design for a horizontal gel slab electrophoresis unit, as shown and described. 